NANO3 EFFECTS ON PROPERTIES OF Y-BASED AND PB-BASED CERAMIC SUPERCONDUCTORS

Authors
KUMAR TSS THIRUMAL T VENKATESAN M
Citation
Tss. Kumar et al., NANO3 EFFECTS ON PROPERTIES OF Y-BASED AND PB-BASED CERAMIC SUPERCONDUCTORS, Transactions of the Indian Institute of Metals, 48(3), 1995, pp. 217-220
Citations number
5
Categorie Soggetti
Metallurgy & Metallurigical Engineering
Journal title
Transactions of the Indian Institute of Metals
ISSN journal
09722815 → ACNP
Volume
48
Issue
3
Year of publication
1995
Pages
217 - 220
Database
ISI
SICI code
0972-2815(1995)48:3<217:NEOPOY>2.0.ZU;2-4
Abstract
The Effect of NaNO3 on the sinterability of Y1-xZrxBa2Cu3O7 (x = 0.025 & 0.5) has been investigated. Addition NaNo3 during sintering of the superconductors, decreases the sintering temperature to 850 degrees C and improves the thermal stability of the composite without altering t he Tc. But the additive addition to the pre-sintered superconductor de creases the Tc. However, heating of this composite in air at 850 degre es C and 900 degrees C show very different conductivity behaviour. The amount of weight loss above 550 degrees C is also very less for the c omposite than the superconductors. As oxygen annealing has been propos ed to improve the superconducting properties of the recent (Pb0.5Cd0.5 )Sr-2(Y0.7Ca0.3)Cu2O7 Superconductor, the effect of NaNO3 has been inv estigated on this superconductor also. Addition of NaNO3 shifts the re sistivity to higher temperatures and forms a denser structure probably due to liquid phase sintering.